HTML Entity from child window to parent page

Problem when we pass less than char from child window to parent then it changes &lt. after some time googling i did not find some full proof method. so i just created function to replace those vaue

function html_entity_decode(str) {

var ta=document.createElement("textarea");

ta.innerHTML=str.replace(//g,">");

return ta.value;

Thanks

Mahesh Sharma