var clicked=""
var gtype=".gif"
var selstate="_over"
if (typeof(loc)=="undefined" || loc==""){
	var loc=""
	if (document.body&&document.body.innerHTML){
		var tt = document.body.innerHTML.toLowerCase();
		var last = tt.indexOf("costos3.js\"");
		if (last>0){
			var first = tt.lastIndexOf("\"", last);
			if (first>0 && first<last) loc = document.body.innerHTML.substr(first+1,last-first-1);
		}
	}
}

document.write("<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\"><tr>");
tr(false);
writeButton(loc+"","eset.html","costos3_b1",265,20,"Especificaciones Técnicas","",0);
writeButton(loc+"","esap.html","costos3_b2",265,20,"Actividades preliminares","",0);
writeButton(loc+"","esele.html","costos3_b3",265,20,"Excavaciones y llenos estructurales","",0);
writeButton(loc+"","esp.html","costos3_b4",265,20,"Pavimentos","",0);
writeButton(loc+"","esov","costos3_b5",265,20,"Obras varias","",0);
writeButton(loc+"","esc.html","costos3_b6",265,20,"Concretos","",0);
writeButton(loc+"","esar.html","costos3_b7",265,20,"Acero de refuerzo","",0);
writeButton(loc+"","esrda.html","costos3_b8",265,20,"Redes de distribución, acometida","",0);
writeButton(loc+"","esraa.html","costos3_b9",265,20,"Redes y acometidas de alcantarillado","",0);
writeButton(loc+"","escre.html","costos3_b10",265,20,"Canalizaciones para redes de energía","",0);
writeButton(loc+"","escrt.html","costos3_b11",265,20,"Canalizaciones para redes telefonicas","",0);
writeButton(loc+"","esdae.html","costos3_b12",265,20,"Disposiciones arquitectonicas en edificaciones","",0);
writeButton(loc+"","esmret.html","costos3_b13",265,20,"Mampostería, revoques, enchapados y techos","",0);
writeButton(loc+"","espa.html","costos3_b14",265,20,"Pisos y acabados","",0);
writeButton(loc+"","escc.html","costos3_b15",265,20,"Carpintería y cerrajería","",0);
writeButton(loc+"","espvca.html","costos3_b16",265,20,"Pintura, vidrios, cerraduras y aseo","",0);
writeButton(loc+"","esis.html","costos3_b17",265,20,"Instalaciones de servicios","",0);
writeButton(loc+"","esssp.html","costos3_b18",265,20,"Señalizacion de seguridad y protección","",0);
writeButton(loc+"","esia.html","costos3_b19",265,20,"Impacto ambiental","",0);
writeButton(loc+"","esce.html","costos3_b20",265,20,"Cuadros y esquemas","",0);
tr(true);
document.write("</tr></table>")
loc="";

function tr(b){if (b) document.write("<tr>");else document.write("</tr>");}

function turn_over(name) {
	if (document.images != null && clicked != name) {
		document[name].src = document[name+"_over"].src;
	}
}

function turn_off(name) {
	if (document.images != null && clicked != name) {
		document[name].src = document[name+"_off"].src;
	}
}

function reg(gname,name)
{
if (document.images)
	{
	document[name+"_off"] = new Image();
	document[name+"_off"].src = loc+gname+gtype;
	document[name+"_over"] = new Image();
	document[name+"_over"].src = loc+gname+"_over"+gtype;
	}
}

function evs(name){ return " onmouseover=\"turn_over('"+ name + "')\" onmouseout=\"turn_off('"+ name + "')\""}

function writeButton(urld, url, name, w, h, alt, target, hsp)
{
	gname = name;
	while(typeof(document[name])!="undefined") name += "x";
	reg(gname, name);
	tr(true);
	document.write("<td>");
	if (alt != "") alt = " alt=\"" + alt + "\"";
	if (target != "") target = " target=\"" + target + "\"";
	if (w > 0) w = " width=\""+w+"\""; else w = "";
	if (h > 0) h = " height=\""+h+"\""; else h = "";	
	if (url != "") url = " href=\"" + urld + url + "\"";
	
	document.write("<a " + url + evs(name) + target + ">");	
	
	if (hsp == -1) hsp =" align=\"right\"";
	else if (hsp > 0) hsp = " hspace=\""+hsp+"\"";
	else hsp = "";
	
	document.write("<img src=\""+loc+gname+gtype+"\" name=\"" + name + "\"" + w + h + alt + hsp + " border=\"0\" /></a></td>");
	tr(false);
}