function limpiezaCampo(estado) 
	{
			var srch = document.getElementById('busqueda');
			if ((srch.value == srch.defaultValue) && (estado == 'on'))
			{
				srch.value = '';
			}
			if ((srch.value == '') && (estado == 'off'))
			{
				srch.value = srch.defaultValue;
			}
	} 

	function abreVentana(url,target,width,height) {
	   if(screen.width > 800) {
		   LeftPosition = (screen.width) ? (screen.width-width)/2 : 0;
		   TopPosition = (screen.height) ? (screen.height-height)/2 : 0;
	   }else{
			LeftPosition = (790-width)/2;
			TopPosition = (540-height)/2;
	   }
	   var settings = 'height='+height+',width='+width+',top='+TopPosition+',left='+LeftPosition+',scrollbars=no,resizable=no,status=no' ;
	   var FLOAT=open(url,target,settings);
	   if (FLOAT.focus!=null) FLOAT.focus();
	}
	
	function cambiarSize(Aumento){
			var arrFONT=document.all.tags("FONT");
			i_inicio=document.all['inicio'].sourceIndex;
			i_fin=document.all['fin'].sourceIndex;
			for(i=0;i<arrFONT.length;i++){
			if((arrFONT[i].sourceIndex>=i_inicio) && (arrFONT[i].sourceIndex<=i_fin))
				if (arrFONT[i].size!=0){
					if ((Aumento ==1) && (arrFONT[i].size < 6)){
						arrFONT[i].size++;
					}else if ((arrFONT[i].size!=1) && (Aumento ==0)){
						arrFONT[i].size--;
					}
				}
			}
	}