// JavaScript Documen

    var pos =300;
	var size = 0;
	var numeroAnunciantes = document.getElementsByName("anunciantes");
	var cant = numeroAnunciantes.item(0).value;
	var longitudDiv =  750;
	function moverBanner() {
		cant = numeroAnunciantes.item(0).value;
		longitudDiv =  cant * 150;
		document.getElementById("tiraImg").style.width = longitudDiv + "px";
		size =0;
		for ( i=1; i<cant ;i++){
			
       		size=size+document.getElementById("img"+i).width;
		}
		size = longitudDiv;
		if(Math.abs(pos) < size){
			document.getElementById("tiraImg").style.left = pos +"px";
			pos = pos - 5;
		} else {
			document.getElementById("tiraImg").style.left = 300 +"px";
			pos = parseInt("300");
		}
		to1 = setTimeout("moverBanner()", 40);
	}