/*
	Form Validation

	Attribute Description:

	validate =  "not_empty" - field cannot be empty. stips spaces before validation 
				"integer"   - integer allowed
				"number" 	- decimal allowed
				"email"     - validates email syntax
				"phone" 	- includes international phone numbers
				"positive" 	- positive integer ou decimal value
				"username"	- username with 4 to 20 chars a-z A-Z and 0-9 or _ -
				"password"	- password with 4 to 20 chars A-Z a-z 0-9 and !@#$%^&*()_
				
	multiplos atribultos validate = "integer|not_empty"
	title = "mensagem de erro a apresentar"

	Examples:
	
		Field with username validation:
		<input type="Text" id="username" name="username" validate="username" msg="Username is invalid" />
		
		Field with multiple validation (not_empty and integer):
		<input type="Text" id="age" name="age" validate="not_empty|integer" msg="Age is mandatory and as to be a valid integer" />

*/

	function validateFormTemplate( objForm, divErrorId ) {

		for( var i=0; i< objForm.elements.length; ++i ){
			
			var elem = objForm.elements[i];
			if( !elem.id || elem.length == 0 || !elem.getAttribute("validate") || elem.getAttribute("validate").length == 0 ) continue;
			
			var elemType			= elem.type;
			var elemValue 			= ( elemType == "select" || elemType == "select-one" ? elem.selectedIndex : elem.value );
			var validationType 		= elem.getAttribute("validate");
			var errorMessage 		= elem.getAttribute("title");
			var arrValidationTypes 	= validationType.split("|");
			
			for (var j=0; j < arrValidationTypes.length; j++) {

				var blnValid = true;

				switch( arrValidationTypes[j] ){

					case "not_empty":
						if( elemType == "select-one" && elemValue == 0 ) blnValid = false;
						else{
							if( elemType != "select-one" && allTrim(elemValue) == "" ) blnValid = false;
						}
					break;

					case "integer":
						var filter = /^-?\d+$/;						
						if( ! filter.test( elemValue ) ) blnValid = false;
					break;

					case "number":
						var filter = /^[-+]?\d+(\.\d+)?$/;
						if( ! filter.test( elemValue ) ) blnValid = false;
					break;

					case "email":
						var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
						if( ! filter.test( elemValue ) ) blnValid = false;
					break;

					case "ptzipcode":
						var filter = /^([0-9])+\-+([0-9]{3})+$/;
						if( ! filter.test( elemValue ) ) blnValid = false;
					break;
					
					case "positive":
						var filter = /^\d+$/;
						if( ! filter.test( elemValue ) ) blnValid = false;
					break;
					
					case "phone":
						var filter = /^((\+\d{1,3}(-| )?\(?\d\)?(-| )?\d{1,5})|(\(?\d{2,6}\)?))(-| )?(\d{3,4})(-| )?(\d{4})(( x| ext)\d{1,5}){0,1}$/;
						if( ! filter.test( elemValue ) && elemValue != "" ) blnValid = false;
					break;
					
					case "username":
						var filter = /^[A-Za-z0-9_-]{4,20}$/;
						if( ! filter.test( elemValue ) ) blnValid = false;
					break;
					
					case "password":
						var filter = /^[A-Za-z0-9!@#$%^&*()_]{4,32}$/
						if( ! filter.test( elemValue ) ) blnValid = false;
					break;

					default:
						try {
							blnValid = eval(validationType+"(element)");
						}
						catch( ex ){
							blnValid = true;
						}
					break;
				}
					
				if (blnValid == false) {
					document.getElementById(divErrorId).innerHTML = errorMessage;   
                    //elem.style.backgroundColor = "#FFF8C6";
                    elem.focus(); 
					//if ((typeof element.focus == "function")||(element.focus)) {
					//	element.focus();
					//}
					return false;
				}
				else{
					document.getElementById(divErrorId).innerHTML = "";
					elem.style.backgroundColor = "#FFFFFF";
				}
			}
		}
		return true;
	}
	
	
	
	function allTrim(cValue){
		var lDone=false;

		while (lDone==false){
			if (cValue.length==0) {return cValue;}
			if (cValue.indexOf(' ')==0){cValue=cValue.substring(1);lDone=false; continue;}
			else {lDone=true;}
			if (cValue.lastIndexOf(' ')==cValue.length-1){cValue=cValue.substring(0, cValue.length-1);lDone=false;continue;}
			else {lDone=true;}
		}
		return cValue;
	}