Salesforce - Increase Year Range of Standard Salesforce Datepicker shown

1. Create a narrow home page component and copy the below html code.
2. Add the home page component to home page layout.
3. Done

Component Code

<script language="javascript">

function addoption(selectobj,txt,val){ 

var optn = document.createElement("OPTION"); 

optn.text = txt; 

optn.value = val; 

selectobj.options.add(optn); 

}

var oldwinload = window.onload;

window.onload = function() {  

if (oldwinload) {    

 oldwinload();  

}  

var obj = document.getElementById("calYearPicker"); 

if(obj!=null){  

var d = new Date();

var curYear = d.getFullYear() + 6;

for(var i=curYear;i<2030;i++) { 

 addoption(obj,i,i);  

}

 }

}

</script>