The problem of nested variable names with multiple quotes

 
var i=0; 
function addForm(){ 
i++; 
var textExtra='<p><input type="text" name='+"addInput"+i+' class="addInp"/></p>'; 
$("#inforForm").append(textExtra); 
} 

The effect is to click to add a text box into the form, automatically name the name, the single quotes double quotes nested big head......