editor.collapse(bStart)
Collapses the current selection to a single point. The bStart is a boolean value.
Syntax
            editor.collapse(bStart)
        
Parameter
Type: boolean
Optional. True collapses the Range to its start, false to its end. If omitted, it defaults to false.
Example:
var editor1 = new RichTextEditor("#div_editor1");    
editor1.setHTMLCode("<b>hello world</b>");  
editor1.selectDoc()  
editor1.execCommand("forecolor","red");  
editor1.collapse(false);