function ajusta() {

    var nc = (document.layers) ? true:false
    var ie = (document.all) ? true:false
    var n6 = (document.getElementById) ? true:false
   	var dd=0;
	var ancho=0;
    if(ie)
      {	
    
		dd=window.document.body.offsetWidth; 
		//alert(dd)
		//ancho=(dd-780-25)/2;
		ancho=(dd-780-5)/2;
		if (ancho<1) {ancho=0}
		
		if (document.all['capaCentral']!=null){
			document.all['capaCentral'].style.left=ancho;
			//document.body.style.backgroundImage='url(../r/gif/centro.gif)';
		}	
	}

    else if(n6)
      {      
			dd=window.innerWidth;	
			ancho=(dd-780-15)/2	
			if (ancho<1) {ancho=0}
			
			if (document.getElementById("capaCentral")!=null){
			document.getElementById("capaCentral").style.left=ancho+ 'px';			
			//document.body.style.backgroundImage='url(../r/gif/centro.gif)';	
			}
			
	
	}
	
window.onresize=ajusta;
}


function ajusta_param(valor,val_div) {

		valor_num = parseFloat(valor);
    var nc = (document.layers) ? true:false
    var ie = (document.all) ? true:false
    var n6 = (document.getElementById) ? true:false
   	var dd=0;
	var ancho=0;
    if(ie)
      {	
    
		dd=window.document.body.offsetWidth; 	
		//ancho=(dd-780-25)/2;
		ancho=(dd-valor_num-5)/2;
		
		//alert(ancho)
		ancho=576
		if (ancho<1) {ancho=0}
		
		//eval('document.all['+val_div+']!=null')
		
		if ( eval('document.all['+val_div+']!=null') )
		{
			//document.all['capaCentral'].style.left=ancho;
			eval('document.all['+val_div+'].style.left=ancho;')
			//document.body.style.backgroundImage='url(../r/gif/centro.gif)';
		}	
	}

    else if(n6)
      {      
			dd=window.innerWidth;	
			ancho=(dd-valor_num-15)/2	
			if (ancho<1) {ancho=0}
			
			//if (document.getElementById("capaCentral")!=null)
			if ( eval('document.getElementById('+val_div+')!=null') )
			{
			//document.getElementById("capaCentral").style.left=ancho+ 'px';		
			eval('document.getElementById('+val_div+').style.left=ancho'+'px;')
			//document.body.style.backgroundImage='url(../r/gif/centro.gif)';	
			}
			
	
	}
	
window.onresize=ajusta_param;
}