function resizeScreen(accion){

    if (accion == '-'){
        //$("body").css("zoom", "83%");
        document.body.style.zoom = 0.83;
    }
    else if (accion == '+'){
        //$("body").css("zoom", "120%");
        document.body.style. zoom = 1.2;
        
    }
    else{
       //$("body").css("zoom", "100%");
       document.body.style.zoom = 1;
    }

}

function altRows(id){
	if(document.getElementsByTagName){  
		
		var table = document.getElementById(id);  
		var rows = table.getElementsByTagName("tr"); 
		 
		for(i = 0; i < rows.length; i++){          
			if(i % 2 == 0){
				rows[i].className = "rowAlternativo";
			}else{
				rows[i].className = "row";
			}      
		}
	}
}