Hyperlinks - browser compatibility

Hyperlinks - browser compatibility

I have a dashboard with hyperlinks. The hyperlinks work as expected in the Google Chrome  Version 25.0.1364.99.

However, The links do not work in Internet Explorer 9.0/12 or Safari Version 6.0.2.

I am using the code below

<%Urlstart = ((("http://creator.zoho.com/" + zoho.adminuser) + "/") + zoho.appname) + "/";%>
<a href=<%=Urlstart%>#View:SITES_View target="_top">ALL SITES</a>

Why do the links work in Chrome but not IE or Safari?
How can I fix the links? Some users only use IE so I need it to work in multiple browsers.