Javascript argument non valide div.style.widt

Bonjour à tous,

Je serais trèèèèèèèèès curieux d'avoir vos avis sur le souci suivant qui me semble peu probable, mais vu que ca fait des jours que je suis dedans, je vois ptet plus rien.

principe: panneaux créés à la volée avec php et identifiés comme il faut, panneaux tous invisibles.
il faut clic sur un lien pour faire apparaitre le panneau correspondant.
pour tester j'ouvre un panneau, puis un autre etc. il y a une fonction qui checke d'abord si il n'y en pas un ouvert, le ferme et ouvre celui que j'ai demandé. Ca foire sous IE. les quelques premiers clics tout va bien et puis boum.

Code HTML des liens :

<a href="javascript void setControl('1', size)">lien qui lance le js</a>"

dans le JS, la ligne incriminée est celle où j'affecte une width/height calculée au panel
Code JS

var panel = documentGetElementbyId("machinchose");

var width = Math.round(//resultat d'un calcul);
var height = //resultat d'un calcul
// QUE JE ROUND OU PAS CA GENERE l'ERREUR.

panel.style.width = width // ou bien width+"px"; //ICICICICICICICIC

est-ce que qqun a une idée ?

pour etre bien sur, que j'ai pas "pas vu" qqe chose, je vous met le JS en entier si ca aide.

Merci d'avance!! :)
bonne journée

function setControl(which, size)
{
    // gets the control button
    //var control = document.getElementById("control_"+which);
    //if (!control) {
      //  return false;
    //}
    // gets the control panel
    //var tableau = document.getElementById("content");

		if (checkAll(size)){
	    var panel = document.getElementById("panel_"+which);
	    if (!panel) {
	        return false;
	    }
	    // show panel
	    if (panel.style.display != "block") {
	    		
	        //panel.style.display = "block";
	        //panel.text.display="none";
	        //panel.style.color = "#000000";
	        fadePanel1(which, true, size);
	        //alert("GO"+panel.style.height+"-"+panel.style.width);
	        //alert (panel.counter);
					
	        
	        
	    // hide panel
	    } else {
	    		//tableau.style.display = "none";
	        //panel.style.display ="none";
	       	showText(which, false, size);
	        //fadePanel1(which, false);        
	       // tableau.style.display = "block";
	    }
	  }
	    return true;
	   
}
function checkAll(size){
			
	for ( var i=0; i < 51; i++ ){
		var panel = document.getElementById("panel_"+i);
		if (panel){
			if (panel.style.display != "none"){
				showText(i, false, size);
				
			}
		}
	}
	return true;
}

// fade in delay for panel to appear, default is 10
var fadein_speed = 4;
// fade out delay for panel to hide, default is 5
var fadeout_speed = 4;
// smoothness of fade, lower is better, but it consumes more CPU
// default is 20 refreshes per second
var refresh_rate = 20;

/**
 * Animated fade of a control panel
 *
 * For the counter : 0 = hidden, 100 = shown. Pay attention to IE which is
 * almost twice slower...
 *
 * @param   string which
 * @param   boolean show
 * @return  boolean true
 */
 
 function showText(which, show, size){
 	var panel = document.getElementById("panelin_"+which);
 	// gets the control panel
   // alert(panel.style.height+"-"+panel.style.width);
    if (!panel) {
        return false;
    }
    // clear any existing timeout, so you can click very quickly on the same
    // control button, the panel will move from current position
    if (panel.timeout) {
        clearTimeout(panel.timeout);
    }
    // always dispay the panel while moving
    panel.style.display = "block";
    if (!panel.counter) {
        panel.counter = 0;
    }
    // maximum offset for moving the panel
    var max = 664;
    // get actual counter, so the position of the panel in the fade
    var opacity = panel.counter;
    // avoid flicker when opacity changes to 100%
    if (opacity >= 100) opacity = 100;
    else if (opacity <= 0) opacity = 0;
    panel.style.MozOpacity = (opacity / 100);
    panel.style.filter = "Alpha(opacity="+(3 * opacity / 4)+")";


    
    

    // panel is fading in
    if (show) {
    	
        // end of fade
        if (panel.counter >= 99) {				
					
            return true;
        }
        // increment counter
        panel.counter += fadein_speed;
    // panel is fading out
    } else {
        // end of fade, hide the panel
        
        if (panel.counter <= 0) {
        		//panel.counter = 99;
						fadePanel2(which, false, size)
            panel.style.display = "none";
            return true;
        }
        // decrement counter
        panel.counter -= fadeout_speed;
    }
    // recursive call
    panel.timeout = setTimeout("showText('"+which+"', "+show+", "+size+");", refresh_rate);
    return true;
 	
 	}
function fadePanel1(which, show, size)
{
    // gets the control panel
    var panel = document.getElementById("panel_"+which);
   // alert(panel.style.height+"-"+panel.style.width);
    if (!panel) {
        return false;
    }
    // clear any existing timeout, so you can click very quickly on the same
    // control button, the panel will move from current position
    if (panel.timeout) {
        clearTimeout(panel.timeout);
    }
    // always dispay the panel while moving
    panel.style.display = "block";
    if (!panel.counter) {
        panel.counter = 0;
    }
    // maximum offset for moving the panel
    var max = 664;
    // get actual counter, so the position of the panel in the fade
    var opacity = panel.counter;
    // avoid flicker when opacity changes to 100%
    if (opacity >= 50) opacity = 50;
    else if (opacity <= 0) opacity = 0;
    panel.style.MozOpacity = (opacity / 100);
    panel.style.filter = "Alpha(opacity="+(3 * opacity / 4)+")";
    // sets the next position
    //var left = - Math.pow(panel.counter - 100, 10) / Math.pow(55, 10);
   
    var height = (panel.counter * size)/100; 
    
    //panel.style.left = left+"px";
    //panel.style.color= "#000000";
    panel.style.height = height+"px";
    panel.style.width = "1px";
    
    panel.style.margin = "auto";
    
    

    // panel is fading in
    if (show) {
    	
        // end of fade
        if (panel.counter >= 99) {
        		panel.counter = 0 ;
						fadePanel2(which, true, size);
					
            return true;
        }
        // increment counter
        panel.counter += fadein_speed;
    // panel is fading out
    } else {
        // end of fade, hide the panel
        
        if (panel.counter <= 0) {

            panel.style.display = "none";
            return true;
        }
        // decrement counter
        panel.counter -= fadeout_speed;
    }
    // recursive call
    panel.timeout = setTimeout("fadePanel1('"+which+"', "+show+", "+size+");", refresh_rate);
    return true;
}


function fadePanel2(which, show, size)
{
    
    // gets the control panel
    var panel = document.getElementById("panel_"+which);
    //alert(panel.style.height+"-"+panel.style.width);
    if (!panel) {
        return false;
    }
    // clear any existing timeout, so you can click very quickly on the same
    // control button, the panel will move from current position
    if (panel.timeout) {
        clearTimeout(panel.timeout);
    }
    // always dispay the panel while moving
    panel.style.display = "block";
    if (!panel.counter) {
        panel.counter = 0;
    }
    // maximum offset for moving the panel
    // get actual counter, so the position of the panel in the fade
        var opacity = panel.counter;
    // avoid flicker when opacity changes to 100%
    if (opacity >= 100) opacity = 99;
    else if (opacity <= 50) opacity = 50;
    panel.style.MozOpacity = (opacity / 100);
    panel.style.filter = "Alpha(opacity="+(3 * opacity / 4)+")";
  	var width = Math.round((panel.counter * 664)/100);
    panel.style.width= width;
    panel.style.margin = "auto";
    

    // panel is fading in
    if (show) {
    	
        // end of fade
        if (panel.counter >= 99) {
            //panel.text.display="block";
       
           	showText(which, true);
           //panel.style.display = "block";
            return true;
        }
        // increment counter
        panel.counter += fadein_speed;
    // panel is fading out
    } else {
        // end of fade, hide the panel
        
        if (panel.counter <= 0) {
        	  panel.counter = 99;
        		fadePanel1(which, false, size);
            //panel.style.display = "none";
            return true;
        }
        // decrement counter
        panel.counter -= fadeout_speed;
    }
    // recursive call
    panel.timeout = setTimeout("fadePanel2('"+which+"', "+show+", "+size+");", refresh_rate);
    return true;
}