Check if a site is up and running

gistfile1.txt

#!/bin/bash

if wget -nv -p $1 &> $2
then
	if cat $2 | grep -i "error"
	then
		echo "Site has error"
		cat $2 | grep -i -B 1 "error" | mail -s "$3" $4
	else
		echo "Site OK"
	fi
else
	sleep 10
	if ! wget -nv -p $1 &> $2
	then
		echo "Site is down"	
		echo "Site down" | mail -s "$3" $4
	fi
fi