Remove Selected Element in Javascript

<div dir="ltr"><input id="selectedseat" type="text" value="1,2,3,4,5,6" />

 

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var num = document.getElementById("selectedseat").value;
var arr = num.split(",");
var newoneworld = arr.length;
if(newoneworld==1){var myarr = new Array(arr[0]);}
if(newoneworld==2){var myarr = new Array(arr[0],arr[1]);}
if(newoneworld==3){var myarr = new Array(arr[0],arr[1],arr[2]);}
if(newoneworld==4){var myarr = new Array(arr[0],arr[1],arr[2],arr[3]);}
if(newoneworld==5){var myarr = new Array(arr[0],arr[1],arr[2],arr[3],arr[4]);}
if(newoneworld==6){var myarr = new Array(arr[0],arr[1],arr[2],arr[3],arr[4],arr[5]);}function removeByElement(arrayName,arrayElement)
{
for(var i=0; i&lt;arrayName.length;i++ )
{
if(arrayName[i]==arrayElement)
arrayName.splice(i,1);
}
}

removeByElement(myarr,no);

document.getElementById("selectedseat").value = myarr;

 

</div>