function init() {
	setPopups();
}

function Ventana(URL,Nombre,Flags) { 
  window.open(URL,Nombre,Flags);
}

function setPopups() {
	
	var anchors = document.getElementsByTagName("a");
	var acount = anchors.length;
	
	var canchor;
	var crel;
	var clink;
	
	var i;
	
	for(i = 0; i<acount; i++) {
		canchor = anchors[i];
		crel = canchor.rel;		
		
		if( crel.substr(0,9) == 'imgpopup_' ) {
			
			var size = crel.substr(9,9);
			var x = size.indexOf('x');
			canchor['w'] = size.substr(0,x);
			canchor['h'] = size.substr(x+1,4);
			canchor['n'] = i;
			
			clink = anchors[i].href;
			
			canchor.onclick = function() {Ventana('imgpopup.php?src='+this.href, 'Creciendo'+this.n, 'location=no,width='+this.w+',height='+this.h);return false;};
			
		}
	}
}

window.onload = init;