salesforce - How to get the previous selected value for select list in visaulforce page -

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<apex:selectoption itemvalue="reports" itemlabel="select report" /> <apex:selectoption itemvalue="1" itemlabel="test1"/> <apex:selectoption itemvalue="2" itemlabel="test2"/>
</apex:selectlist> select value 1 first, how retrieve value of 1 after choose 2 in visualforce page

you can use onfocus attribute of selectlist component storing current value of picklist before choosing new 1 in js variable , onselect or onchange attributes of selectlist processing of new , old values.

<apex:selectlist value="{!test}" onfocus="storeoldvalue(this.value)">     <apex:selectoptions value="{!testoptions}"/> </apex:selectlist>  <script type="text/javascript"> function storeoldvalue(oldvalue){     oldval = oldvalue; } </script>

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