MINI MOTEUR DE TEMPLATE

function JTemplate() {}
JTemplate.prototype={
	vdata:null,
	str_var:"this.vdata.",
	p_this: new RegExp("[\$]","gmi"),
	patern: new RegExp("(\{(/|(if|while) ([^\{\}]+)|([\$])([^\{\} ]+))\})","gmi"),
	error:null,
	parse: function(data) {
		var datab=data.split(this.patern);
		var action=[];
		var strout="";
		for (var i=0; i < datab.length; i++ )
		{
			if ( datab[i].match(this.patern) )
			{
				if ( datab[i+2] == "if" )
				{
					if ( !action.length || (action.length && action[action.length-1].v) )
					{
						test=eval(datab[i+3].replace(this.p_this,this.str_var));
						action.push({t:"if",v:test});
					}
					else
						action.push({t:"if",v:false});
				}
				else if ( datab[i+2] == "while" )
				{
					if ( !action.length || (action.length && action[action.length-1].v) )
					{
						test=eval(datab[i+3].replace(this.p_this,this.str_var));
						action.push({t:"while",v:test,p:i});
					}
					else
						action.push({t:"while",v:false,p:i});
				}
				else if ( datab[i+1] == "/" )
				{
					if ( !action.length )
					{
						this.error="error";
						alert(this.error);
						return false;
					}
					else if (action[action.length-1].t != "while" || !action[action.length-1].v )
						action.pop();
					else if (action[action.length-1].t == "while")
					{
						i=action[action.length-1].p-6;
						action.pop();
					}
				}
				else if ( datab[i+4] == "$" )
				{
					if ( !action.length || ( action.length && action[action.length-1].v ))
					{
						myvar=(this.str_var+datab[i+5]).replace(this.p_this,this.str_var);
						myvar=eval(myvar);
						strout+=myvar;
					}
				}
				i+=5;
			}
			else
			{
				if ( !action.length || ( action.length && action[action.length-1].v ))
					strout+=datab[i];
			}
		}
		return strout;
	}
}

str="start encore un test {if 1} <ul>{while $test++<5}\
<li>loop haha {$test} </li>{/}</ul> end {/} hihhiih";

test = new JTemplate();
test.vdata={myvar:"sa marche", test:3};
document.write(str+"<hr />");
document.write(test.parse(str));