function MM_preloadImages() { //v3.0
    var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function trim (field) {
	field = field.replace( /^\s+/, "");
	field = field.replace( /\s+$/, "");
	if (field.length == 0) {
		return false;
	}
	return true;
}
function emailOk (email) {
	var regexp_email = /^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+\.[a-zA-Z0-9-]+$/;
	email = email.replace( /^\s+/, "");
	email = email.replace( /\s+$/, "");
	if (!regexp_email.test (email)) {
		return false;
	}
	return true;
}

function hideLayer(whichLayer) {
    if (document.getElementById) {
        document.getElementById(whichLayer).style.display = "none";
    } else if (document.all) {
        document.all[whichlayer].style.display = "none";
    } else if (document.layers) {
        document.layers[whichLayer].display = "none";
    }
}

function showLayer(whichLayer) {
    if (document.getElementById) {
        document.getElementById(whichLayer).style.display = "block";
    } else if (document.all) {
        document.all[whichlayer].style.display = "block";
    } else if (document.layers) {
        document.layers[whichLayer].display = "block";
    }
}