function sethreftitle(href,title)
{
href.innerText = title;
}<a href="http://www.sina.com" onmouseover="sethreftitle(this,'www.sina.com')">sina</a>
{
href.innerText = title;
}<a href="http://www.sina.com" onmouseover="sethreftitle(this,'www.sina.com')">sina</a>
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