// JavaScript Document
String.prototype.trim = function()
{
return this.replace(/^\s*/, "").replace(/\s*$/, "");
}

    function setCleanValue(e){
        try{var element = e.target          }catch(er){};
        try{var element = event.srcElement  }catch(er){};
        if(element.value == 'Digite seu site aqui'){
			element.value = '';
			element.className = 'caixa';
		}
    }

    function setDefaultValue(e){
        try{var element = e.target          }catch(er){};
        try{var element = event.srcElement  }catch(er){};
		var t = element.value;
		t = t.trim();
        
        if(t.length == 0){
		element.value = 'Digite seu site aqui';
		element.className = 'labelCaixa';
		}
		if(t.length >0){
		element.value = t;
		element.className = 'caixa';
		}
    }

    window.onload = function(){ 
        document.getElementById('site').onfocus    = setCleanValue;
        document.getElementById('site').onblur     = setDefaultValue;
    }