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 clearField(id) {
	
	document.getElementById(id).value="";
	
}

function checkEmptyField(id, defaultValue) {
	
	var currentValue = document.getElementById(id).value;
	
	if (currentValue == "" ) {
		
		document.getElementById(id).value = defaultValue;
	
	}

}

function checkData(formId, ignoreString) { // ignoreString - text string seperated by "--"

	var form = document.getElementById(formId);
	var formLength = form.length;
	var ignoreArray = ignoreString.split("--");
	
	for (var i=0; i<formLength; i++) {
	
		var thisId = form.elements[i].id;
		
		if(thisId != "") {
			
			var value = document.getElementById(thisId).value
			if (in_array(value, ignoreArray)) {
			
				alert("Enter a valid value");
				document.getElementById(thisId).focus();
				return false;
			
			}
		
		}
		
	}

}

function in_array(needle, haystack)
{
    for(var key in haystack)
    {
        if(needle === haystack[key])
        {
            return true;
        }
    }

    return false;
}