/*
 funciones comunes
*/
function setDiv(_div,_html){
	
	document.getElementById(_div).innerHTML = _html;
	
}


function getValue(_elemento){

	var obj = document.getElementById(_elemento);

	if(obj.tagName=='SELECT'){
		var n = obj.selectedIndex;    // Which menu item is selected
		var val = obj[n].text;        // Return string value of menu item
		
		return val;
		
	}else{
	
		return obj.value;
		
	} 
  
	

}

function setValue(_elemento, val){
  
  var obj = document.getElementById(_elemento);

	if(obj.tagName=='SELECT'){
	
		for (var i = 0; i < obj.length; ++i){
			if (obj[i].text == val){
				obj.selectedIndex = i;
			}
		}
	
	}else{
	
	 document.getElementById(_elemento).value=val;
	 
	}

}
function sendAjax(page,params, functionCallBack){
 
 _ajax.open('get',page+'?'+params,false);
 _ajax.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
 _ajax.onreadystatechange= functionCallBack;
 _ajax.send(null);
}


function changeClass(elemento,clas){

	document.getElementById(elemento).className = clas;
	return true;
}